Davoud Teimouri - Virtualization & Datacenter

A technology blog mainly focusing on virtualization and datacenter

NMI purple diagnostic screen on HPE ProLiant Gen8 servers

It seems, there is an issue on HPE G8 servers with the below ESXi versions:

  1. ESXi 5.5 Patch 10
  2. ESXi 6.0 Patch 4
  3. ESXi 6.5

Intel® IOMMU’s (aka VT-d) interrupt remapper functionality has been changed in the above versions and you need to enable it manually:


  • Run this command:

    esxcli system settings kernel set –setting=iovDisableIR -v FALSE

  • Reboot the ESXi host.
  • Ensure the iovDisableIR setting is set to FALSE with this command:

    esxcli system settings kernel list -o iovDisableIR

    For example:

    esxcli system settings kernel list -o iovDisableIR

    Name          Type  Description                                 Configured  Runtime  Default
    ————  —-  —————————————     ———-  ——-  ——-
    iovDisableIR  Bool  Disable Interrupt Routing in the IOMMU…   FALSE       FALSE    TRUE        



Davoud Teimouri is as a professional blogger, vExpert 2015-2016-2017, VCA, MCITP. This blog is started with simple posts and now, it has large following readers.

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